STRUCTURAL ANALYSIS AND DESIGN PROGRAM

FINITE ELEMENT ANALYSIS OF THE LANDING GEAR

During the spring project review at Austin we discuss the communication problem between the groups. It is important to mention our progress in this aspect during the summer. We now have the opportunity to browse the Internet using Windows 95 Internet browser from our homes by dialing to the NT server at the lab. We can also share files from the lab network. We are using 28.8 fax modems.

A linear programming technique will be used to calculate the minimum amount of material that will meet the requirements and will make it less expensive and least weight design. This technique consists on finding the minimum limits satisfying the requirements of the system. The linear programming is a method that is approached graphically by comparing in this case deflection vs. buckling of the members. The best selection for minimum weight will be found after getting the intercept of the minimum limits concerning the major structural constraints. This process will be done by a computer program upgraded to Visual Basic.

ANSYS will be used for the finite element analysis of the lunar landing gear. The finite element analysis will consists not only on the structural analysis but also in the dynamic and acoustic simulation of the landing and launch according to the data from the propulsion group.

The most important step by now is to get confident with the methodology and procedure to follow in order to be able to change dimensions and conditions, if required, for expected changes in the final designs. The team has also been reading literature concerning the project. For example about linear programming and also searching for some structural drawings.

The second step will be taking into consideration the components, connections and joints separately. For this finite element analysis we will be using ANSYS.

We are designing some structural drawings of landing gears in AutoCAD which we can send you some copies by next week. From these drawing we are going to chose one to build and to be tested.

From our home page you will be able to see pictures, data and any kind of information that we consider of interest by the other universities. We will be displaying the picture of our first model by next week in our Web page. Please if any questions please e-mail Andrea Struve.

Comments to: author

Andrea Struve | Electrical and Computer Engineering |

Jose Maldonado | Structural Analysis and Design |

maldonado_j1@dt3.dt.uh.edu | |

Karla P. Reina | Structural Analysis and Design |

reina_k@dt3.dt.uh.edu | |

Group Leader : | |

Dr. Alberto Gomez-Rivas | alberto@dt3.dt.uh.edu |

Faculty member: | |

Jeff Border |